Ophiarachnella ramsayi

Ophiarachnella ramsayi is a species of brittle star, a type of echinoderm. These fascinating creatures are characterized by their star-shaped bodies and long, flexible arms, making them distinct members of the marine ecosystem.

Description & Characteristics

Ophiarachnella ramsayi is a relatively small brittle star, typically reaching a maximum size of around 5 centimeters in diameter. Its body is disc-shaped and covered in small, granular scales. The arms are slender and flexible, and they are covered in short spines. These spines are used for locomotion and defense. Ophiarachnella ramsayi is usually a pale brown or yellowish-brown color, with a distinctive pattern of darker brown or black spots on its body and arms.

Habitat and Occurrence

Ophiarachnella ramsayi is found in a variety of marine habitats, including rocky reefs, sandy bottoms, and seagrass meadows. It is particularly common in shallow water environments, but it can also be found at depths of up to 100 meters. Ophiarachnella ramsayi is widely distributed throughout the Indo-Pacific region, ranging from the Red Sea and the East African coast to the Pacific Islands. It is a particularly common species in the tropical waters of the Indian Ocean.

Taxonomy

Ophiarachnella ramsayi belongs to the Class Ophiuroidea, which encompasses all brittle stars. It is further classified within the Order Ophiacanthida, a group of brittle stars that are typically characterized by their long, slender arms. Ophiarachnella ramsayi is part of the Family Ophiodermatidae, a family of brittle stars that are known for their flattened bodies and granular scales. This classification reflects the evolutionary history and shared traits of Ophiarachnella ramsayi with other brittle stars.

Feeding

Ophiarachnella ramsayi is a carnivore that feeds primarily on small invertebrates, such as crustaceans, worms, and mollusks. It uses its long arms to capture its prey, which is then brought to its mouth. The mouth is located on the underside of the body, and it is surrounded by a ring of small teeth. Ophiarachnella ramsayi plays a vital role in the food web, contributing to the regulation of populations of other invertebrates.